This International Standard defines the quality features of hand hammers which are judged to be satisfactory as far as the hammer head and the assembly are concerned. It defines the characteristics and verification methods for hammer heads and for their assembly. It applies to hammers used under normal working conditions, i.e. only used to strike items having a maximum hardness of 46 HRC. NOTE Striking items of a greater hardness is liable to cause chipping, this necessitates choosing hammers with properties different from those defined in this International Standard. This International Standard does not apply to steel hammer heads with a head mass of less than 100 g.